Plz help i need advice

Ok so I’m not sure how to go about this, I literally hate going out into public with my boyfriend, he stares at literally every single girl that has a nice ass or tits, I’m 30 weeks pregnant right now and it’s so hard to feel worth something or pretty when my boyfriend can’t stop looking at other girls and I bring it up to him and he tells me I need to get over it and accept who he is and that he shouldn’t have to change for me, out of curiosity I asked him what he thinks about when he stares at the girls and he said he can’t help it and that he tries to picture what they look like naked, he told me that I should just move on because I’m too “controlling” and that I’m crazy but how am I supposed to feel when I’m walking along side my boyfriend 30 weeks pregnant and his focus is envisioning every girl he sees naked except me, this has been happening all 2 years we’ve been dating and he had cheated on me twice before so at this point I feel so insecure, he also watches porn every chance he can get even when I’m around and available for him and constantly looks up thick Latinas and me being a white female with an A cup boob size and small booty how am I supposed to feel, I really don’t know anymore???? What should I do? Am I crazy? Am I controlling? At 27 weeks pregnant I went into preterm labor and my baby is inner uterine growth restricted so I spent a couple days in the hospital and he was allowed to stay with me, however my nurse was a really pretty thick Latina and his whole attention the whole time was always staring at her, while I was literally trying to breath through contractions every 1-2 minutes myself. Is there something wrong with me?